| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/tonic-0.6.2/src/transport/service/reconnect.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>reconnect.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../../../normalize.css"><link rel="stylesheet" href="../../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../../ayu.css" disabled><link rel="stylesheet" href="../../../../dark.css" disabled><link rel="stylesheet" href="../../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../../storage.js"></script><script defer src="../../../../source-script.js"></script><script defer src="../../../../source-files.js"></script><script defer src="../../../../main.js"></script><noscript><link rel="stylesheet" href="../../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../../../tonic/index.html"><div class="logo-container"> |
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| </pre><pre class="rust"><code><span class="kw">use </span><span class="kw">crate</span>::Error; |
| <span class="kw">use </span>pin_project::pin_project; |
| <span class="kw">use </span>std::fmt; |
| <span class="kw">use </span>std::{ |
| future::Future, |
| pin::Pin, |
| task::{Context, Poll}, |
| }; |
| <span class="kw">use </span>tower::make::MakeService; |
| <span class="kw">use </span>tower_service::Service; |
| <span class="kw">use </span>tracing::trace; |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>Reconnect<M, Target> |
| <span class="kw">where |
| </span>M: Service<Target>, |
| M::Error: Into<Error>, |
| { |
| mk_service: M, |
| state: State<M::Future, M::Response>, |
| target: Target, |
| error: <span class="prelude-ty">Option</span><<span class="kw">crate</span>::Error>, |
| has_been_connected: bool, |
| is_lazy: bool, |
| } |
| |
| <span class="attribute">#[derive(Debug)] |
| </span><span class="kw">enum </span>State<F, S> { |
| Idle, |
| Connecting(F), |
| Connected(S), |
| } |
| |
| <span class="kw">impl</span><M, Target> Reconnect<M, Target> |
| <span class="kw">where |
| </span>M: Service<Target>, |
| M::Error: Into<Error>, |
| { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>new(mk_service: M, target: Target, is_lazy: bool) -> <span class="self">Self </span>{ |
| Reconnect { |
| mk_service, |
| state: State::Idle, |
| target, |
| error: <span class="prelude-val">None</span>, |
| has_been_connected: <span class="bool-val">false</span>, |
| is_lazy, |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><M, Target, S, Request> Service<Request> <span class="kw">for </span>Reconnect<M, Target> |
| <span class="kw">where |
| </span>M: Service<Target, Response = S>, |
| S: Service<Request>, |
| M::Future: Unpin, |
| Error: From<M::Error> + From<S::Error>, |
| Target: Clone, |
| <M <span class="kw">as </span>tower_service::Service<Target>>::Error: Into<<span class="kw">crate</span>::Error>, |
| { |
| <span class="kw">type </span>Response = S::Response; |
| <span class="kw">type </span>Error = Error; |
| <span class="kw">type </span>Future = ResponseFuture<S::Future>; |
| |
| <span class="kw">fn </span>poll_ready(<span class="kw-2">&mut </span><span class="self">self</span>, cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>) -> Poll<<span class="prelude-ty">Result</span><(), <span class="self">Self</span>::Error>> { |
| <span class="kw">let </span><span class="kw-2">mut </span>state; |
| |
| <span class="kw">if </span><span class="self">self</span>.error.is_some() { |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(())); |
| } |
| |
| <span class="kw">loop </span>{ |
| <span class="kw">match </span><span class="self">self</span>.state { |
| State::Idle => { |
| <span class="macro">trace!</span>(<span class="string">"poll_ready; idle"</span>); |
| <span class="kw">match </span><span class="self">self</span>.mk_service.poll_ready(cx) { |
| Poll::Ready(r) => r<span class="question-mark">?</span>, |
| Poll::Pending => { |
| <span class="macro">trace!</span>(<span class="string">"poll_ready; MakeService not ready"</span>); |
| <span class="kw">return </span>Poll::Pending; |
| } |
| } |
| |
| <span class="kw">let </span>fut = <span class="self">self</span>.mk_service.make_service(<span class="self">self</span>.target.clone()); |
| <span class="self">self</span>.state = State::Connecting(fut); |
| <span class="kw">continue</span>; |
| } |
| State::Connecting(<span class="kw-2">ref mut </span>f) => { |
| <span class="macro">trace!</span>(<span class="string">"poll_ready; connecting"</span>); |
| <span class="kw">match </span>Pin::new(f).poll(cx) { |
| Poll::Ready(<span class="prelude-val">Ok</span>(service)) => { |
| state = State::Connected(service); |
| } |
| Poll::Pending => { |
| <span class="macro">trace!</span>(<span class="string">"poll_ready; not ready"</span>); |
| <span class="kw">return </span>Poll::Pending; |
| } |
| Poll::Ready(<span class="prelude-val">Err</span>(e)) => { |
| <span class="macro">trace!</span>(<span class="string">"poll_ready; error"</span>); |
| |
| state = State::Idle; |
| |
| <span class="kw">if </span>!(<span class="self">self</span>.has_been_connected || <span class="self">self</span>.is_lazy) { |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Err</span>(e.into())); |
| } <span class="kw">else </span>{ |
| <span class="kw">let </span>error = e.into(); |
| <span class="macro">tracing::debug!</span>(<span class="string">"reconnect::poll_ready: {:?}"</span>, error); |
| <span class="self">self</span>.error = <span class="prelude-val">Some</span>(error); |
| <span class="kw">break</span>; |
| } |
| } |
| } |
| } |
| State::Connected(<span class="kw-2">ref mut </span>inner) => { |
| <span class="macro">trace!</span>(<span class="string">"poll_ready; connected"</span>); |
| |
| <span class="self">self</span>.has_been_connected = <span class="bool-val">true</span>; |
| |
| <span class="kw">match </span>inner.poll_ready(cx) { |
| Poll::Ready(<span class="prelude-val">Ok</span>(())) => { |
| <span class="macro">trace!</span>(<span class="string">"poll_ready; ready"</span>); |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(())); |
| } |
| Poll::Pending => { |
| <span class="macro">trace!</span>(<span class="string">"poll_ready; not ready"</span>); |
| <span class="kw">return </span>Poll::Pending; |
| } |
| Poll::Ready(<span class="prelude-val">Err</span>(<span class="kw">_</span>)) => { |
| <span class="macro">trace!</span>(<span class="string">"poll_ready; error"</span>); |
| state = State::Idle; |
| } |
| } |
| } |
| } |
| |
| <span class="self">self</span>.state = state; |
| } |
| |
| <span class="self">self</span>.state = state; |
| Poll::Ready(<span class="prelude-val">Ok</span>(())) |
| } |
| |
| <span class="kw">fn </span>call(<span class="kw-2">&mut </span><span class="self">self</span>, request: Request) -> <span class="self">Self</span>::Future { |
| <span class="macro">tracing::trace!</span>(<span class="string">"Reconnect::call"</span>); |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(error) = <span class="self">self</span>.error.take() { |
| <span class="macro">tracing::debug!</span>(<span class="string">"error: {}"</span>, error); |
| <span class="kw">return </span>ResponseFuture::error(error); |
| } |
| |
| <span class="kw">let </span>service = <span class="kw">match </span><span class="self">self</span>.state { |
| State::Connected(<span class="kw-2">ref mut </span>service) => service, |
| <span class="kw">_ </span>=> <span class="macro">panic!</span>(<span class="string">"service not ready; poll_ready must be called first"</span>), |
| }; |
| |
| <span class="kw">let </span>fut = service.call(request); |
| ResponseFuture::new(fut) |
| } |
| } |
| |
| <span class="kw">impl</span><M, Target> fmt::Debug <span class="kw">for </span>Reconnect<M, Target> |
| <span class="kw">where |
| </span>M: Service<Target> + fmt::Debug, |
| M::Future: fmt::Debug, |
| M::Response: fmt::Debug, |
| Target: fmt::Debug, |
| <M <span class="kw">as </span>tower_service::Service<Target>>::Error: Into<Error>, |
| { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, fmt: <span class="kw-2">&mut </span>fmt::Formatter<<span class="lifetime">'_</span>>) -> fmt::Result { |
| fmt.debug_struct(<span class="string">"Reconnect"</span>) |
| .field(<span class="string">"mk_service"</span>, <span class="kw-2">&</span><span class="self">self</span>.mk_service) |
| .field(<span class="string">"state"</span>, <span class="kw-2">&</span><span class="self">self</span>.state) |
| .field(<span class="string">"target"</span>, <span class="kw-2">&</span><span class="self">self</span>.target) |
| .finish() |
| } |
| } |
| |
| <span class="doccomment">/// Future that resolves to the response or failure to connect. |
| </span><span class="attribute">#[pin_project] |
| #[derive(Debug)] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>ResponseFuture<F> { |
| <span class="attribute">#[pin] |
| </span>inner: Inner<F>, |
| } |
| |
| <span class="attribute">#[pin_project(project = InnerProj)] |
| #[derive(Debug)] |
| </span><span class="kw">enum </span>Inner<F> { |
| Future(<span class="attribute">#[pin] </span>F), |
| Error(<span class="prelude-ty">Option</span><<span class="kw">crate</span>::Error>), |
| } |
| |
| <span class="kw">impl</span><F> ResponseFuture<F> { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>new(inner: F) -> <span class="self">Self </span>{ |
| ResponseFuture { |
| inner: Inner::Future(inner), |
| } |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>error(error: <span class="kw">crate</span>::Error) -> <span class="self">Self </span>{ |
| ResponseFuture { |
| inner: Inner::Error(<span class="prelude-val">Some</span>(error)), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><F, T, E> Future <span class="kw">for </span>ResponseFuture<F> |
| <span class="kw">where |
| </span>F: Future<Output = <span class="prelude-ty">Result</span><T, E>>, |
| E: Into<Error>, |
| { |
| <span class="kw">type </span>Output = <span class="prelude-ty">Result</span><T, Error>; |
| |
| <span class="kw">fn </span>poll(<span class="self">self</span>: Pin<<span class="kw-2">&mut </span><span class="self">Self</span>>, cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>) -> Poll<<span class="self">Self</span>::Output> { |
| <span class="comment">//self.project().inner.poll(cx).map_err(Into::into) |
| </span><span class="kw">let </span>me = <span class="self">self</span>.project(); |
| <span class="kw">match </span>me.inner.project() { |
| InnerProj::Future(fut) => fut.poll(cx).map_err(Into::into), |
| InnerProj::Error(e) => { |
| <span class="kw">let </span>e = e.take().expect(<span class="string">"Polled after ready."</span>); |
| Poll::Ready(<span class="prelude-val">Err</span>(e)) |
| } |
| } |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../../" data-current-crate="tonic" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
